Energy Basics
What unit is energy measured in?
joules
What type of electromagnetic wave can humans see?
visible light
What is the unit used to measure the loudness of sound?
decibels (dB)
Which part of the ear captures sound waves from the environment?
outer ear
What is the main ingredient in bread?
flour
Name the process by which energy changes from one form to another
energy transfer
Which electromagnetic waves are used for cooking food?
microwaves
What property of sound wave changes to make a sound higher or lower in pitch?
frequency
When you rub your hands together and feel heat, what type of energy transfer is happening?
friction
Which vitamin is most commonly found in citrus fruits like oranges?
vitamin c
What type of energy does a stretched rubber band have?
elastic potential energy
Name the electromagnetic wave with the highest energy.
gamma rays
Can sound travel through a vacuum?
no
What is the main source of energy for Earth?
sun
What type of food is commonly made from milk, bacteria, and rennet?
cheese
What law states that energy cannot be created or destroyed?
the law of conservation of energy
Which type of electromagnetic radiation is used for sterilizing medical equipment?
ultraviolet (UV) radiation
What type of wave is a sound wave: longitudinal or transverse?
longitudinal
What form of energy is stored in food?
chemical
What type of fruit is the main ingredient in guacamole?
avocado
Give an example of renewable energy
solar / wind / hydroelectric energy
Which electromagnetic waves are used in TV remote controls?
infared
What is the phenomenon called when sound waves reflect off a surface and return to the listener?
echo
What process is used by plants to convert light energy into chemical energy?
photosynthesis
What is the name of the sugar that is the primary source of energy for the human body?
glucose